Multiple choice

Which of the following is not an external factor affecting health?

  1. Environmental pollution

  2. Immune disfunctioning

  3. Drinking alcohol

  4. Microorganisms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

All factors which are outside our body are called “external” factors and they include pollution, alcohol and microbes, etc. But our immune system, i.e. the system of defensive mechanisms inside our body by which we fight against infection, is internal because it involves WBC’s of blood and its malfunctioning is not an external factor. So, (2) is the correct answer.

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